Locoregional failure remains the principal mode of mortality in head and neck squamous cell carcinoma (HNSCC) treated with conventional chemoradiation therapy. Magnetic resonance-guided radiation therapy (MRgRT) allows for adaptive radiation dose escalation based on tumor response and may improve therapeutic outcomes while limiting toxicities. This protocol evaluates a novel framework for radiation delivery with concurrent atezolizumab in patients with advanced HNSCC. Dose-Escalated Hypofractionated Adaptive Radiotherapy (DEHART) modifies radiation dose using MRgRT by escalating radiation dose to residual tumor while deescalating radiation dose to areas of tumor regression.
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Incidence of Dose-Limiting Toxicities at 50 Gy With Concurrent Atezolizumab
Timeframe: 12 months
Incidence of Dose-Limiting Toxicities at 50 Gy
Timeframe: 12 months
Incidence of Dose-Limiting Toxicities at 55 Gy
Timeframe: 12 months
Incidence of Dose-Limiting Toxicities at 60 Gy
Timeframe: 12 months
Maximum Tolerated Radiation Dose
Timeframe: 12 months